package com.yft.data.util;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class MapToBean {

	/**
	 * map 转 Bean，传入对象
	 * 
	 * @param mpFrom
	 * @param objTo
	 * @return
	 */
	public static Object mapToBean(Map mpFrom, Object objTo) {
		Object[] objKeys = mpFrom.keySet().toArray();
		String strFieldName = "";

		try {
			for (Object objkey : objKeys) {
				strFieldName = objkey.toString();

				Field objField = objTo.getClass().getDeclaredField(
						strFieldName.toLowerCase());
				objField.setAccessible(true);

				objField.set(objTo, mpFrom.get(strFieldName));
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return objTo;
	}

	/**
	 * map 转 Bean，传入对象类型
	 * 
	 * @param map
	 * @param cls
	 * @return
	 */
	public static Object map2Bean(Map map, Class cls) {
		Object obj = null;
		try {
			obj = cls.newInstance();
		} catch (Exception e) {
			e.printStackTrace();
		}
		// 取出bean里的所有方法
		Method[] methods = cls.getMethods();
		for (int i = 0; i < methods.length; i++) {
			// 取方法名
			String method = methods[i].getName();
			// 取出方法的类型
			Class[] cc = methods[i].getParameterTypes();
			if (cc.length != 1)
				continue;

			// 如果方法名没有以set开头的则退出本次for
			if (method.indexOf("set") < 0)
				continue;
			// 类型
			String type = cc[0].getSimpleName();

			try {
				// 转成小写
				// Object value = method.substring(3).toLowerCase();
				Object value = method.substring(3, 4).toLowerCase()
						+ method.substring(4);
				System.out.println("value == " + value);
				// 如果map里有该key
				if (map.containsKey(value) && map.get(value) != null) {
					// 调用其底层方法
					setValue(type, map.get(value), i, methods, obj);
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return obj;
	}

	/***************************************************************************
	 * 调用底层方法设置值
	 */
	private static void setValue(String type, Object value, int i,
			Method[] method, Object bean) {
		if (value != null && !value.equals("")) {
			try {
				if (type.equals("String")) {
					// 第一个参数:从中调用基础方法的对象 第二个参数:用于方法调用的参数
					method[i].invoke(bean, new Object[] { value });
				} else if (type.equals("int") || type.equals("Integer")) {
					method[i].invoke(bean, new Object[] { new Integer(""
							+ value) });
				} else if (type.equals("double") || type.equals("Double")) {
					method[i].invoke(bean,
							new Object[] { new Double("" + value) });
				} else if (type.equals("float") || type.equals("Float")) {
					method[i].invoke(bean,
							new Object[] { new Float("" + value) });
				} else if (type.equals("long") || type.equals("Long")) {
					method[i].invoke(bean,
							new Object[] { new Long("" + value) });
				} else if (type.equals("boolean") || type.equals("Boolean")) {
					method[i].invoke(bean,
							new Object[] { Boolean.valueOf("" + value) });
				} else if (type.equals("BigDecimal")) {
					method[i].invoke(bean, new Object[] { new BigDecimal(""
							+ value) });
				} else if (type.equals("Date")) {
					Date date = null;
					if (value.getClass().getName().equals("java.util.Date")) {
						date = (Date) value;
					} else {
						String format = ((String) value).indexOf(":") > 0 ? "yyyy-MM-dd hh:mm:ss"
								: "yyyy-MM-dd";
						SimpleDateFormat sf = new SimpleDateFormat();
						sf.applyPattern(format);
						date = sf.parse((String) (value));
					}
					if (date != null) {
						method[i].invoke(bean, new Object[] { date });
					}
				} else if (type.equals("byte[]")) {
					method[i].invoke(bean,
							new Object[] { new String(value + "").getBytes() });
				}
			} catch (Exception e) {
				System.out
						.println("将linkHashMap 或 HashTable 里的值填充到javabean时出错,请检查!");
				e.printStackTrace();
			}
		}
	}

	public static void main(String[] args) {
		User user = new User();
		Map map = new HashMap();
		// map.put("userId", "123");
		// map.put("userName", "userName123");
		// map.put("userTel", "userTel123");
		map.put("age", 234);
		map.put("create", new Date());
		map.put("money", new BigDecimal(123).setScale(2));
		map.put("score", 23.33323);
		Long start = System.currentTimeMillis();
		user = (User) map2Bean(map, user.getClass());
		Long end = System.currentTimeMillis();
		System.out.println(" 用时 == " + (end - start));
		System.out.println(user.toString());
	}
}

class User {

	private String userId;
	private Long age;
	private Double score;
	private Date create;

	private String userName;
	private BigDecimal money;

	private String userTel;

	public String getUserId() {
		return userId;
	}

	public void setUserId(String userId) {
		this.userId = userId;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getUserTel() {
		return userTel;
	}

	public void setUserTel(String userTel) {
		this.userTel = userTel;
	}

	/**
	 * @return the age
	 */
	public Long getAge() {
		return age;
	}

	/**
	 * @param age
	 *            the age to set
	 */
	public void setAge(Long age) {
		this.age = age;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		System.out.println(" age=" + age);
		System.out.println(" userTel=" + userTel);
		System.out.println(" userName=" + userName);
		System.out.println(" userId=" + userId);
		System.out.println(" score=" + score);
		System.out.println(" create=" + create);
		System.out.println(" money=" + money);
		return super.toString();
	}

	/**
	 * @return the score
	 */
	public Double getScore() {
		return score;
	}

	/**
	 * @param score
	 *            the score to set
	 */
	public void setScore(Double score) {
		this.score = score;
	}

	/**
	 * @return the create
	 */
	public Date getCreate() {
		return create;
	}

	/**
	 * @param create
	 *            the create to set
	 */
	public void setCreate(Date create) {
		this.create = create;
	}

	/**
	 * @return the money
	 */
	public BigDecimal getMoney() {
		return money;
	}

	/**
	 * @param money
	 *            the money to set
	 */
	public void setMoney(BigDecimal money) {
		this.money = money;
	}

}